NEW TRANSIENT-X-RAY SOURCE IN THE SCUTUM REGION DISCOVERED WITH ASCA

Using the ASCA satellite we have discovered a new transient X-ray sour ce at the position of RA(2000)= 18(h)45(m)2(s), Dec(2000) = -4 degrees 33'31'' (uncertainty = 1'), designated as AX 1845.0-0433. The NH-corr ected X-ray flux was similar to 3 x 10(-12) erg s(-1) cm(-2) in the 0. 7-10 keV region at the beginning of the observation; the X-ray source then suddenly flared up to a level of about 1 x 10(-9) erg s(-1) cm(-2 ) in the 0.7-10 keV region after N-H-correction within less than a few hours. It exhibited flare-like activity on the minimum time scale of a few ten minutes; the activity lasted until the end of the observatio n. The X-ray spectra in the quiescent and flare states resemble those of binary X-ray pulsars. However, no coherent pulsation was found in t he range from 125 ms to 4096 s.